S3 Intelligent-Tiering is the correct choice because the logs must remain immediately available and access patterns are unknown so automatic tiering reduces cost without adding operational overhead.

S3 Intelligent-Tiering automatically moves objects between access tiers based on observed access patterns and does not require manual lifecycle rules. This keeps objects ready for instant retrieval while optimizing storage cost for objects that become infrequently accessed.

S3 Standard-Infrequent Access (S3 Standard-IA) is less suitable because unpredictable frequent reads can incur retrieval fees and minimum storage duration charges which can increase total cost when access cannot be predicted.

S3 Glacier is not appropriate because it requires restore operations and has retrieval delays which prevents immediate access to logs when they are needed.

S3 One Zone-Infrequent Access (S3 One Zone-IA) is not a good fit because it reduces durability by storing data in a single Availability Zone and it still applies retrieval fees which can make costs higher under variable access patterns.

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